Syag,
“What were you refering to in your second response?”
To this
“There have been enough people with covid symptoms put on vents or compressed o2 due to low levels”
There have been so many people (all with good intentions) that have made a lot of public announcements, thus driving the public crazy.
Everyone is free to do as they see fit, But having a million people get pulse oximeters when in general people with no shortness of breath (or being out of breath or unable to walk around the room) or any other breathing symptoms will not have a lower than usual sp02 reading.
On the other hand, some people that had very good readings had a sudden decrease in saturations and deteriorated very rapidly.
It is not very clear as to the etiology of this. There are many theories.